Difference between revisions of "QRP Labs High Performance SDR Receiver"

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*** High performance Receiver module uses a Quadrature Sampling Detector (QSD), also known as a Tayloe Detector
 
*** High performance Receiver module uses a Quadrature Sampling Detector (QSD), also known as a Tayloe Detector
 
*** [https://www.onsemi.com/pdf/datasheet/fst3253-d.pdf FST3253] Mixer is arranged as a double-balanced mixer for maximum performance
 
*** [https://www.onsemi.com/pdf/datasheet/fst3253-d.pdf FST3253] Mixer is arranged as a double-balanced mixer for maximum performance
*** There is a transmit/receive switch onboard
+
*** Mute during transmit switch circuit
 
*** {https://www.ti.com/lit/ds/symlink/lm4562.pdf Low noise LM4562 op-amps] are used in instrumentation amplifier configuration to provide excellent common mode noise rejection
 
*** {https://www.ti.com/lit/ds/symlink/lm4562.pdf Low noise LM4562 op-amps] are used in instrumentation amplifier configuration to provide excellent common mode noise rejection
 
*** The audio output of the module is isolated using two 600:600-ohm transformers to reduce or eliminate the ground loop problems which can easily occur in SDR systems
 
*** The audio output of the module is isolated using two 600:600-ohm transformers to reduce or eliminate the ground loop problems which can easily occur in SDR systems

Revision as of 15:17, 20 November 2021

Rx bpf poly.jpg

Features

  • Three modules mount together
    • QRP Labs Radio Module
      • High performance Receiver module uses a Quadrature Sampling Detector (QSD), also known as a Tayloe Detector
      • FST3253 Mixer is arranged as a double-balanced mixer for maximum performance
      • Mute during transmit switch circuit
      • {https://www.ti.com/lit/ds/symlink/lm4562.pdf Low noise LM4562 op-amps] are used in instrumentation amplifier configuration to provide excellent common mode noise rejection
      • The audio output of the module is isolated using two 600:600-ohm transformers to reduce or eliminate the ground loop problems which can easily occur in SDR systems
      • The module is designed to directly drive a stereo input sound-card
      • Receiver board has a socket for the standard QRP Labs Band Pass Filter kit which can be routed to an external bandpass filter switch card
    • QRP Labs Band Pass Filter
    • QRP Labs Polyphase filter
      • Polyphase network plug-in module kit which cancels the unwanted sideband and produces a single sideband (SSB) output
  • The receiver requires a local oscillator (LO) input at 4x the receive frequency
  • The receiver module is sized 80 x 37mm

Radio Links

Silkscreen

IQ RX PCB.PNG